| ▲ | linker3000 4 hours ago | |
This is really cool, and a fantastic piece of work. It may come in handy when diagnosing / fixing C64 boards. Stretch goals: * Allow the simulation to run diagnostics carts. * On the 250407 board I have had timing edge cases with PLA replacements - the fix is often to fit a small (~100pF) capacitor on the /CASRAM line to slow it down a bit. The cap is fitted from the left leg of an existing 82 Ohm resistor and a nearby ground point close to 'RAM6'. Some boards actually have official space for the capacitor - designated C204. With some original PLA variants on real boards the capacitor may already be fitted. It would be good to be able to enable and disable this capacitor and set its value to see the effects. | ||